A basic physiological explanation of why rockfish are prone to pressure-induced injuries. Every rockfish has a gas-filled organ called a swim bladder that expands and contracts to control its buoyancy. When a fish is caught and reeled in, this mechanism for moving vertically in the water column is thrown out of whack. The brochure discusses the pros and cons of different methods for returning fish to depth quickly to reduce barotrauma and shows pictures of these devices.
Diagram shows what happens to a rockfish's internal organs when it is brought from depth to the surface.
Publication Number: NA
Authors: California Sea Grant and California Department of Fish and Game
Product Type: Paper brochure
Copyright Date: 2008